We divide 493577 by 20
The aim is to understand the frequency of 20 in 493577.

Moving on to step 1:
20 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 20

Moving on to step 2:
If we divide 49 by 20, we get 2 and a remainder of 9.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 40 from 49 and we're left with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 20

Going ahead to step 3:
20 goes into 93 4 times with a remainder of 13.
The next digit of our result is 4. 
Result so far: 24.0
The remainder is 13 after subtracting 80 from 93.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 20

Step 4:
20 can be fit into 135 6 times, resulting in a remainder of 15.
Put 6 as the next digit of the answer. 
Result so far: 246.0
Subtract 120 from 135 to get 15.
Bring next digit (7) of the dividend behind the 15 and repeat the process: 157 / 20

Advancing to step 5:
When dividing 157 by 20, we get 7 with a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 2467.0
The remainder is 17 after subtracting 140 from 157.
Bring next digit (7) of the dividend behind the 17 and repeat the process: 177 / 20

Let's proceed to step 6:
The number 20 fits into 177 8 times, leaving a remainder of 17.
The next digit of our result is 8. 
Result so far: 24678.0
The remainder is 17 after subtracting 160 from 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
170 divided by 20 is 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 24678.8
If we take 160 away from 170, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
20 goes into 100 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 24678.85
If we take 100 away from 100, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
20 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 24678.85
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 24678.85
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 24678.85 with a remaining 0.0.